IPv6 Address Planning

[Roger Jorgensen]

On Tue, 9 Aug 2005, Simon Lockhart wrote:
> On Tue Aug 09, 2005 at 09:11:36PM +0200, Roger Jorgensen wrote:
> > Would strongly suggest you forget the idea of using /80 and /112, don't 
> > use anything smaller than /64. You might not see the need for it now but 
> > experience have thought me to respect the /64 boundary.
> 
> Okay, I'm sticking to /64 for everything (except /128 loopbacks), but I'm
> interested to know why you say experience told you to avoid non-/64's?

old story really but when I started out I didn't really see the need for 
using a /64 for p2p links, or even a /112 or /126. So at some point they 
introduced anycast (think that's the name) and my usage of /127 gave me a 
nice /dev/null feature for all those links :} Fixed it by adding a /128 
for each of the IPs in the /127... I'm quite sure more of these type of 
features/changes will arrive in the future.

and as I said in a private mail to Cody, wouldn't surprise me if some 
vendor start to use 64bits uniq ID for interfaces or other places and 
then all of your p2p links needs to be redone. Not really likely but who  
knows? 



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Roger Jorgensen              |
rogerj at stud.cs.uit.no        | - IPv6 is The Key!
http://www.jorgensen.no      | roger at jorgensen.no
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